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When generating code for Win64 EH, emit StartProc and EndProc directives.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132250 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Charles Davis 2011-05-28 04:21:04 +00:00
parent a0112d0c39
commit f46337004a
3 changed files with 33 additions and 0 deletions
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2
include/llvm/CodeGen/AsmPrinter.h
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@ -192,6 +192,8 @@ namespace llvm {
};
CFIMoveType needsCFIMoves();
bool needsSEHMoves();
/// EmitConstantPool - Print to the current output stream assembly
/// representations of the constants in the constant pool MCP. This is
/// used to print out constants which have been "spilled to memory" by

5
lib/CodeGen/AsmPrinter/AsmPrinter.cpp
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@ -604,6 +604,11 @@ AsmPrinter::CFIMoveType AsmPrinter::needsCFIMoves() {
return CFI_M_None;
}
bool AsmPrinter::needsSEHMoves() {
return MAI->getExceptionHandlingType() == ExceptionHandling::Win64 &&
MF->getFunction()->needsUnwindTableEntry();
}
void AsmPrinter::emitPrologLabel(const MachineInstr &MI) {
MCSymbol *Label = MI.getOperand(0).getMCSymbol();

26
lib/CodeGen/AsmPrinter/Win64Exception.cpp
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@ -54,9 +54,35 @@ void Win64Exception::EndModule() {
/// BeginFunction - Gather pre-function exception information. Assumes it's
/// being emitted immediately after the function entry point.
void Win64Exception::BeginFunction(const MachineFunction *MF) {
shouldEmitMoves = shouldEmitPersonality = shouldEmitLSDA = false;
// If any landing pads survive, we need an EH table.
bool hasLandingPads = !MMI->getLandingPads().empty();
shouldEmitMoves = Asm->needsSEHMoves();
const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
unsigned PerEncoding = TLOF.getPersonalityEncoding();
const Function *Per = MMI->getPersonalities()[MMI->getPersonalityIndex()];
shouldEmitPersonality = hasLandingPads &&
PerEncoding != dwarf::DW_EH_PE_omit && Per;
unsigned LSDAEncoding = TLOF.getLSDAEncoding();
shouldEmitLSDA = shouldEmitPersonality &&
LSDAEncoding != dwarf::DW_EH_PE_omit;
if (!shouldEmitPersonality && !shouldEmitMoves)
return;
Asm->OutStreamer.EmitWin64EHStartProc(Asm->CurrentFnSym);
}
/// EndFunction - Gather and emit post-function exception information.
///
void Win64Exception::EndFunction() {
if (!shouldEmitPersonality && !shouldEmitMoves)
return;
Asm->OutStreamer.EmitWin64EHEndProc();
}